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MG MGB GT V8 Factory Originals Technical - How much of my exhaust headers to wrap.

Hi All,

I have trawled the archives finding lots of conflicting advice on this and I'm a bit unsure as to what to do.

I am about to fit my block huggers for the final time, my neighbour has given me a lot of heat wrap (he's a pipe fitter by trade).

I was thinking about applying some heat wrap to them , but have read that fully wrapping them might cause them to crack with the heat.

If I do this - hw much should I wrap/leave exposed? (I can't really do much of the downpipe part anyway because of steering shaft clearance).

I am unlikely to spend the time, money and effort in getting them ceramic coated. I know it's the preffered option, but it's not going to happen.

Thanks for your thoughts,

Liam
Liam H

What ever you do... when you start it up for the first time with the wrap on make sure you do it outside well away from your house. It smokes like a ****** apparently!
JC Moulds

Why don't you have them ceramic coated instead of wrapping them? IMHO it looks a lot better than heat wrap and can reduce the under hood temp about as well as wrapping and is not too expensive.
Michael S. Domanowski

Liam - if you have the factory pig-iron headers - they will most likely crack - best advice comes from Michael but if you do not have time - then leave them uncovered.

Roger
Binthere-donethat - got the Teeshirt
RMW

Thanks all,

Best leave them as they are then, I have added a 2nd fan standard fan under dashboard swith control, with the the first always on.

I might add a third cowled puller on the front of the radiator, and see how I get on.

Liam.
Liam H

Liam,

on my car, i wraped them with Kevlar ribbon that is normally used on racing bikes. There have never been problems with the headers made of mild steel.

My first installation were the block huggers too in the early 1980's, but soon fabricated different ones that look like the RV8 style headers sold now. As these headers exit through the inner wings, much of the hot air is also able to escape this way.

If you do not want to coat or wrap the headers, considre upon extra vent holes if necessary. A third blower did not deliver reasonable results on my car and i took it out again soon.

Ralph
Ralph

Liam , I know you got the wrap [crap] free , but that stuff is junk in my opinion . Sorry . My car had it on , it was put on by p/owner , the rv8 headers were only 3 years old & had been bought new , the car had approx. 13,000 mi. on it , the wrap was greasy & ugly , so , I decieded to take them off & have the headers Jet Hotted [ceramic coated]. After getting the headers off & unwrapping them , I was shocked , they were covered in rust & looked 20 years old . 2 years later , the jet hot looks as it did when I took em out of the box , no rust , no discoloration , I am more than pleased , & will never again do wrap or [so] called hi-temp. paint.
Denny1

DIY option
http://www.racestuff.co.uk/70001/info.php?p=8&pno=0&pid=425152&cat=&ack=9&search=&sought=
supplied by
http://www.camcoat.u-net.com./Coatings.htm

http://www.centuryperformance.com/heatwraps.asp
Paul Wiley

Thanks All,

Paul, the spray on DIY CERAMIC EXHAUST COATING you mention looks very interesting, I have contacted them to see how much I would need and what is needed by way of prep.

Has anyone any experience of using it?

I dont plan to race the car or super tune the engine, so I'm hoping that knocking the edge off the worst of the heat may be enough.


Liam
Liam H

Liam

I know its not the cheapest option but ceramic coating does a good job and looks good, it can be done in several colours.

I had one coat inside and two on the outside.Having spent so much on the conversion the extra yard was worthwhile.

Graham
GLG Lavis

Liam:
The Camcoat site looks like they are resellers for Tech Line Coatings. The product names are the same. I have been using their products for a while in engine assembly as well as their Cermakrome ceramic header coating. It is waterbased and easily sprayed and can be baked in any oven in which the part will fit. Their Black Satin header coating is not difficult to work with but requires some nasty chemicals for cleanup.

http://www.techlinecoatings.com/

Phil
Phil O

This thread was discussed between 20/03/2007 and 23/03/2007

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